Lock



N. B. HURD Feb. 19, 1935.

LOCK

Original Filed DGO. l5, 1928 INVENTOR y W32 Km/ut edle ATTORNEYS Patented Feb. 19,k 1935 PATENT OFFICE Lock Norman B. Hurd, New Britain, Conn., assignor to Thev American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Application December 15, 1928,:Serial No. 326,207

v Renewed August 23, 1930 22 Claims.

This invention relates to locks and latches,

particularly yof the type in `which a key` mechanism, such as a pin cylinder lock, is used within one of the knobsv to turn a lock and/or latch operating spindle, which passes inwardly through the knob shank. It is of further importance in connection vwith such locks and latches as embody mechanism mounted on and cooperating with the knob shank. The invention primarily resides in a construction which permits they cylinder lock mechanism contained within the knob'to bequickly and easily removed by a` mechanic, not necessarily skilled inthe lock art, so that another cylinder, adapted to be operated by a different key, may besubStituted. In' most locks of the type referred to, to substitute one cylinder for another within the knob mechanisminvolves not 'only considerable labor, but also requires a skilled mechanic. My present invention is of importance in that it reduces substantially the time required to change the cylinder, and also obviates the necessity'fof employing a lock expert for that'purpose. The purpose of this invention may be better understood when it is appreciated that in largeapartment houses and oflice buildings, wherein a great number of such locks are employed, the occupants of the apartments and oliices are frequently changed, so that it becomes necessary to pro- '30 vide 'each new tenant with a different key.` The present vinvention permits thisto be easily and quickly "done without disturbing the main lock mechanism in the ,slightestV and without even opening the door on which the lock is mounted. In the present invention, the knob and knob shank construction are such that the knob,` or a portion thereof, maybe detached from the shank without disturbing the position of the latter, whereby, when this is done, an entirely new cylinder lock element may be quicklyl and easily substituted for the old one. Y

In the form shown herein ,the removable knob portionl is locked tofand` unlocked fromthe balance of the knob by means of a special key, which may be kept by the `one in charge of the building i containing the offices or apartments. .l

In the accompanying drawing, which shows my invention in one of its preferred forms-Y p Fig. 1 is,. in the main, a longitudinal section of a door knob and associated parts, Aconstructed to embody my invention;

Fig. 2 is an end view of one of the parts;` Fig. 3 is an end view of other parts, `partly assembled;l

(Cl. Z0-9,1) 4 e Y v Fig. 4 is anfend view of certain details, partly assembled; i

Fig. 5 is a view'similar toFig. 1,-` but showing certain partsin a diierentfpo'sition, and also showing a different key from that illustrated in Fgkw." Fig.` 6 is a longitudinalsectional view partly broken away, taken lon a plane at right angles to that of Fig. 5;

Fig. 7 is a `perspective View of a detail. 1 represents 'a knob shank having a iiange 1a, which the form shownconstitutes a part of the door knob. 2 is the other part of the' knob which is arranged to screw onto the part 1a, the screw thread being s hown at `2a. When theftwo parts of the door knobfare assembled,` a hollow space is formed therein infwh'ich is lo` cated a key-controlled device in the form of a cylinder lock V3, the outer end of saidlock being accessible at the central outer end of the knob so that a key 4 mayV be inserted to operate the pin tumblers',` whereby the plug 5 of said vcylinder lock may be turned to rotate the usual spindle 6 secured totheinner end of the plug in any suitable manner, and 'by which any appropriate lock and/or latch mechanism '(not shown) may be actuated'. The knob shank 1 V may co-act with any Vsuitable door latch vor lock mechanism, the constructionof which is not essential to this invention, and hence is not shown. Itpwill be observed that thekey 4, which I will term the pass key, operates'all of the pin tumblers excepting the innermost one 12, this latter being employed for a specialpurpose. When the'key 4 is in place, the plug 5 may be turned to rotate the spindle 6 and "actuate Vany 'mechanism that may be associated therewith. Inasmuch as the' key-controlled defvice isy located within the hollow knob, it is, of course, importantthat the'two separable parts ,thereof must be locked together not only -so that the shank of the knob may beturnedA when the hand is 4applied to the outer knob` section 2, but' also' because the key-controlled device within the knob must be properly held and sup-` ported therein and retained against removal excepting by lone having the authority to re move it for repair or substitution. To thatvend I yprovide devices within the knob, which, when the separable sections thereof are connectedtogether, are moved so as'to lock saidsections so that they cannot be disconnected one from the other. `This knob locking mechanism I` Awill now describe. l

In the oppositeinner edges of the screw threaded portion of the part la, I provide two diametrically positioned recesses forming guide slots for receiving two sliding locking dogs '1 -7, which in Fig. 3 are shown as standing retracted in said slots. In the knob section 2, I provide two recesses 8-8, which, when the knob sections are assembled, face up with the dogs 7 7, so that when the latterare projected into said recesses 8-8, the two parts 1a and 2 ofthe knob cannot be unscrewed or otherwise disconnected. In order to move the dogs 7 7, I provide a controlling device 9 having a hub which is rotatably mounted on the inner end of the plug 5, said rotatable device having a. flanged portion in which are two angularl'y arranged cam' grooves Qe-Qe. On one side i'ace of each dog 7 is a pin or stud 10, which,l whenl the parts are assembled, stands in its respective cam groove 9a, as indicated in Figs. 3, 4 and 6.

Referring particularly to Fig. 3, it willv be seen that' it the? controller 9 is rotated counterclockwise from the position shown in Fig. 3,v it would tend to project the" dogs 7--7 into the recesses 8-8 of the part 2' thus locking the knob parts together.y Normally,` the controlling device 9 is locked by tumbler 12 to the cylinder 3, as shown ir-rliig'.` ll, and: isunlocked from'` the plug 5,l so-that when? a key ysuch as the key 4. is inserted said plug may be turned to rotate the spindle 6' without turning the controller 9. When, however, it is desiredy to operate said controller, a special master-key is used, this key being adapted to operate all of the pintumblers as shown in Figi. 5. When this key is used,y it

z moves tumbler 12 to a position where it locks the' controller 9 to the plug and releases it from the cylinder 3. Under this last condition, it is obvious that by turning the key 15 the controller 9 may be correspondingly turned, by which turning movement the dogs 7-7 vmay be proljected or retracted for the purpose previously described. In the particular form shown, it will be understoodv that the controller 9 is partly cut away on one side, as at 14, to afford clearance for the pin chamber 3a of the pin cyl'- inder lock. y

While I have shown and described herein a key-controlled device of the pin cylinder type in which aflat key is employed, my invention is notnecessarily limited tothat speciiic form of lock, as other types might'be employed, the main purpose being to provide in the construction of this lock a. key-controlled device within a. hollow knob, accessible thro-ugh the outer end of the knob, whereby, by the use of one key, 'the lock mechanism such as the spindle 6 may -be operated under normal conditions,` and whereby by the use of another key insertible into said device the knob locking mechanism may be actuated so thatuthe knob may be separated topermit the key-controlled device to-be changed or repaired as desired.

I claim: v

1` `A hollow doorknob including two separable parts, means for causing said parts to be engageable and disengageable by rotation of one relatively to the other, locking means vwithin said knob to prevent relativel rotation of said parts when assembled, door lock operating `means also associated with said knob, and key controlled means also within said knob and operable by the rotation of one key to operate the door lock operating means and by the rotation of another key to operate the knob locking means.

2. A hollow door knob including two separable parts, means for causing said parts to be engageable and disengageable by rotation of one relatively to the other, knob locking means within said knob to prevent relative rotation of said parts when assembled, door lock operating means also associated with said knob, and key controlled means also within said knob and Voperable by the rotation of one' key to operate; the; door lock operating means and by the rotation of another key. to operate the knob locking means, the outer section of said separable knob having a key passage in the outer end thereof.

3. A hollow door knob including two separable parts, means for' causing said parts to be engageable and disengageable by rotation of one relatively to the other, knob locking means withi'nv said knob tot prevent relative rotation of said parts whenassembled, door lock operating means also associated with said knob, and key controlled means also Within said knob and operablefvbyithe rotationofjone keyto operate the door `lock operating meansj and by the rotation of another key tooperate the knob-v locking'r means into-and outV ofknob locking position, the outer section ofv` said4 separable knob having a passage in the outer end .thereof for receiving either of said-keys. l g

4. A hollow door knob including two separable parts, means for causing said parts toghe en gageable and disengag'eable. by rotation o1' one relatively tothe other, knob locking means within said knob to prevent relative rotation oi.' said parts whenV assembled, door lock operating means also associated with said knob and` .key controlled means also within said knob and operable by one key to operate the door lock operating means and by another key to operate the knob locking means, said key controlled means including a rotatable plug and. a series of pin tumblers, said knob locking means being mounted on said plug andlookable thereto and unlockable therefrom vby one of said tumblers. 5.- A hollow door knob including two separabl parts, means for causing said parts to be engageable and disengageable by rotation of one relatively to the other, knob locking means within said knob to prevent relative rotation of said parts when assembled, door lock operating means also associated with said knob, and key controlled means also within said knob and operable by the rotation of one key to operate the door lock operating means and by the rotation of another key to operate the knoblocking means, said yknob locking means includingy a movable dog carried by one of said knob parts andrengageable with and disengageable from the other knobpart. y t

6. A hollow door knob including twoy separable parts,'n1eans for causing said parts to be engageable and disengageable by rotation of one relative-ly to vthe other, knob locking means within said knob to prevent relative rotation .of said parts when assembled, door lock operating means also associated with said knob, and Vkeycon-v trolled-meansalso Within said knob and operable by the rotation of one key to operate the door lock operating means and by the rotation of another key to operate the `knoblocking means, said knob locking means including a. movable dog carried by one of said knob parts and engageable with and disengageable from the'other der to a door, a plug in said cylinder, said plug being formed in two relatively movable parts, and means actuated by one of said. relatively movable parts for actuating said radially movable member.

8. In a lock, a lock cylinder, a substantially radially movable member for locking said cylinder to a door, and key-operable means for operating a door locking means by the use of one key and for actuating said radially movable member by the use of va dinerent key.

9. In a lock, a hollow door knob including two separable parts, means for causing said parts to be engageable and disengageable by rotation of one relatively to the other, a cylinder within said knob, a plug within said cylinder, and means actuated by said plug for locking a door and for locking the parts of said knob together.

10. In a lock, a hollow door knob including two separable parts, means for causing said parts to be engageable and disengageable by rotation of one relatively to the other, a cylinder in said knob, a plug in said cylinder, said plug including two relatively movable parts, and means actuated by one of said relatively movable parts for locking the parts of said knob together.

11. In a lock, a hollowidoor knob including two separable parts, a substantially radially movable member for locking said parts together, and a cylinder lock within said knob, said lock being operable to lock a door and also to actuate said radially movable member.

12. In a lock, a hollow door knob including two separable parts, a substantially radially movable member for locking said parts together, a lock cylinder within said knob, a plug within said cylinder, and means actuated bysaid plug for locking a door and for actuating said radially movable member.

13. In a lock, a hollow door knob including two separable parts, a substantially radially movable member for locking said parts together, a cylinder in said knob, a plug in said cylinder, said plug beingl formed in two relatively movable parts, and means actuated by one of said relatively movable parts for actuating said radially movable member.

14. In a lock, a hollow door knob including two separable parts, a substantially radially movable member for locking said parts together, and keyoperable means within said knob for operating a door locking means by the use of one key and for actuating said radially movable member by the use of a different key.

15. In a lock, a support including two separable parts, a substantially radially movable member for locking said parts together, and a cylinder lock within said support, said lock being operable to lock a door and also'to actuate said radially movable member.

16. In a lock, a support including two separable parts, a substantially radially lmovable member for locking said parts together, a lock cylinder within said support, a plug within said cylinder, and means actuated by said plug for locking a door and for actuating said radially movable member.

17. In a lock, a support including two separable parts, a substantially radially movable member for locking said parts together, a lock cylinder within said support, a plug in said cylinder, said plug being formed in two relatively movable parts, and means actuated by one of said relatively movable parts for actuating said radially movable member.

18. In a lock, a support including two separable parts, a substantially radially movable member for locking said parts together, a lock cylinder within said support, and key-operable means within said cylinder for operating a door locking means by the use of one key and for actuating said radially movable member by the use of a different key.

19. In av door lock, a cylinder lock, a support therefor comprising two separable parts engageable by a relative rotation thereof, means to lock said parts against rotation when said means is in one position and to release said parts for rotation when in another position, said cylinder lock co-operating with said means to positively shift the same to the releasing position.

k20. A hollow knob including two separable parts to permit a key operable lock mechanism to be inserted into and removed from the interior of said knob, said parts being separable by the rotation of one relatively to the other, means for locking said knob parts against separation by rotation relatively to each other, and means movable by said lock mechanism and coacting with the means for locking said knob parts to operate the latter in one direction.

21. A hollow knob including two separable parts to permit a key operable lock mechanism to be inserted into and removed from the interior of said knob, said parts being separable by the rotation of one relatively to the other, means for locking saidl knob parts against separation by rotation relatively to each other, and means movable by said lock mechanism and coacting with the means for locking said knob parts to operate the latter in both directions.

Q2. A lock comprising a knob, a knob shank, a cylinder with a key plug contained within the knob, said knob and said shank being adapted to be fastened together by relative rotary movements, means for locking the shank and the knob against relative turning movements and means operative upon turning movements of the key plug relative to the knob for unlocking said locking means.

` NORMAN B. HURD. 

